Shulou(Shulou.com)06/01 Report--

1. The concept of database

A database is a warehouse that organizes, stores and manages data according to the data structure. It is a collection of organized, shareable and uniformly managed large amounts of data stored in a computer for a long time.

A database is a collection of data stored together in a certain way, shared with multiple users, with as little redundancy as possible, and independent of the application. It can be regarded as an electronic filing cabinet-a place where electronic files are stored. Users can add, query, update, delete and other operations on the data in the file.

two。 The role of database

3. Data hierarchy model

4. Common relational database

5.SQL structured query language

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